Which of the following is an example of Cross-Contamination? A. A customer breaks their tooth after biting into a hamburger with
a piece of glass mixed into it. B. A customer gets sick with E. Coli after eating lettuce that was cut on same cutting board as raw meat. C. A customer gets sick with E. Coli after eating lettuce that was cut on the same cutting board as fully cooked meat. D. A customer gets sick after eating a sandwich that was contaminated with pesticide solution.
The cross contamination can be defined as contamination which is caused due to the contamination of the other food kept aside this food.
A customer who eat lettuce gets disease by the E.coli bacteria due to cross contamination, this is because the lettuce was cut on the same board where previously raw meat was cut.
Raw meat contains E.coli which gets transmitted to the lettuce and then it was contaminated by raw meat.
The human genome density ranges between 12-15 genes per Megabase pairs. This is because humans have approximately 2000 genes in a total of approximately 3 billion base pairs. However, some primitive organisms have an even larger gene density
than humans. An example is bacteria with gene densities ranging between 100 –
500 genes/Mb. Gene density is therefore
not a good characteristic in determining
the complexity of an organism.
